Steering device for vehicle

Abstract

A steering device for a vehicle includes a ball nut coupled with a nut pulley; a motor provided with a motor pulley connected with the nut pulley through a belt; a housing receiving the nut pulley, the belt, and the motor pulley; and a plurality of supports protruding from an inner circumferential surface of the housing to prevent the belt from jumping off the motor pulley.

What is claimed is: 
     
       1. A steering device for a vehicle, comprising:
 a ball nut coupled with a nut pulley; 
 a motor provided with a motor pulley connected with the nut pulley through a belt; 
 a housing receiving the nut pulley, the belt, and the motor pulley; and 
 a plurality of supports protruding from an inner circumferential surface of the housing to prevent the belt from jumping off the motor pulley, 
 wherein the plurality of supports are formed in a portion, surrounding the motor pulley, of the inner circumferential surface of the housing, and 
 wherein the plurality of supports are provided in a first position facing each of two opposite ends of the belt contacting the motor pulley and a second position facing a center of a portion of the belt contacting the motor pulley. 
 
     
     
       2. The steering device of  claim 1 , wherein each end of the plurality of supports faces an outer surface of the belt. 
     
     
       3. The steering device of  claim 2 , wherein a gap between the end of the support and the outer surface of the belt is smaller than a height of gear teeth of the motor pulley. 
     
     
       4. The steering device of  claim 3 , wherein the end of the support contacts the belt. 
     
     
       5. The steering device of  claim 2 , wherein the end of the support is formed to have a curved surface. 
     
     
       6. The steering device of  claim 5 , wherein the end of the support is formed to be convex. 
     
     
       7. The steering device of  claim 5 , wherein the end of the support is formed to be concave. 
     
     
       8. The steering device of  claim 7 , wherein the end of the support is formed in a shape complementary to an opposite portion of the belt.